elasticsearch: versions bumps (security fixes)
elasticsearch: versions bumps (security fixes)

    - elasticsearch
      - 1.5.2
    - java runtime
      - Java 8 update 45

    - k8s plugin
      - 1.1.1

[skip build]

Signed-off-by: António Meireles <9056f7c1f560fe4e0c75ab3cde8bee0cf3d504f4@reformi.st>

AntonioMeireles/dockerfiles